CN106345827A

CN106345827A - Rolling, lubricating and cooling process of metal plates and strips

Info

Publication number: CN106345827A
Application number: CN201611069993.3A
Authority: CN
Inventors: 王红昊; 张逸凡
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-11-15
Filing date: 2016-11-29
Publication date: 2017-01-25

Abstract

The invention belongs to the technical field of processing techniques of metal plates and strips and in particular relates to a rolling, lubricating and cooling process capable of realizing precise quantificational lubricating of metal plates and strips. A technical process of the rolling, lubricating and cooling process is as follows: in a plate and strip processing technique of a rolling device comprising a single rack reversable mill or a double rack reverse rolling mill or a tandem rolling machine with not less than two continuous mills, the upper and lower surfaces of the plates and strips are directly sprayed with rolling oil by spray nozzles with controllable flows arranged above and under the metal plates and strips at inlet sides of rolling directions of all formed racks; meanwhile, the spraying amount of the rolling oil is automatically adjusted by the spray nozzles according to lubricating conditions reflected by rolling parameters so as to meet and keep lubricating; meanwhile, rollers and the plates and strips of the rolling mills are directly sprayed with water at outlet sides of the rolling directions of all the racks, so as to perform process cooling. According to the process, a precise quantificational lubricating and cooling process in different metal plate and strip rolling processes can be realized.

Description

A kind of rolling metal plate and tape lubrication technique

Technical field

The present invention relates to metal plate and belt technology field, concretely it is related to one kind and is capable of accurate quantification profit Sliding rolling metal plate and tape lubrication technique.

Background technology

At present, the used medium of the technological lubrication cooling of metal plate and belt processing is mainly emulsion.Emulsion is rolling Oil is dissolved in the presence of emulsifying agent in water and forms oil concentration less than 10% emulsion, and emulsion is formulated simultaneously in casing Storage wherein, is passed through pipeline and nozzle through centrifugal pump, is ejected on roll and rolled piece, and oil absorption therein is in roll and rolled piece (oil film is formed on rolling direction f) surface in deformed area (roll gap), plays lubrication, water plays cooling to roll and rolled piece Effect, the emulsion failing to enter contact in rolling flows back to emulsion casing with the emulsion completing work by deadweight, passes through Filter, insulation and compensate concentration etc., indices adjust qualified after enter back into next cycle of operation.I.e. the lubrication of emulsion is former Reason is as shown in Figure 1.In the inlet region 110 of rolling, the oil droplet 130 in emulsion 120 sticks to shape on roll 140 and rolled piece 150 Become oil film 160, oil film intersects to form oil sump 170 before roll gap.

Carried out in the operation of rolling of sheet metal using emulsion above-mentioned, there is problems in that

First, lubrication effect affects one another, degree of lubrication is difficult to hold

The operating pressure of conventional emulsification liquid is 5-10bar, and this pressure can be absorption rolling on metal plate and belt and roller surface Liquefaction washes out 20-40%, and in emulsion, oil concentration more high lubricating property is better, but cooling performance is poorer, otherwise also So；The size of oil mass in the speed of oil sump formation and oil sump, depending on the size of oil particles degree in emulsion: oil particles are bigger, More easily it is accumulated into big oil droplet, in the oil sump before roll gap area, oil reserve is bigger, ROLLING OIL is also more easily attached on roll Form the oil film of thickness with rolled piece surface, the ROLLING OIL entering in contact in rolling just tends to more；Continuous with mill speed Improve the speed that oil sump formed and lag behind mill speed, now just do not have yet enough oil enter deformed area lubrication is provided so that Rolling cannot be normally carried out, and this situation is in the field of business to be " starved-oil lubrication ", also cry and owe lubrication；And the oil film thickness worked as in deformed area arrives When enough roll and rolled piece being kept apart, arise that rolling is skidded, be also lubrication phenomenon；

Second, trend can only be lubricated it is impossible to precisely adjust lubricating status by fuzzy adjustment

The lubricating ability of emulsion depends on the speed of oil sump formation before deformed area, and in speed and emulsion that oil sump is formed The speed that oil droplet is separated from emulsion is closely related, in emulsion the granule of oil more big easier from emulsion point Separate out；In emulsion the size of oil particles degree mainly by the emulsifier type that selects or emulsifying agent addition number Lai Realize；When lubrication in rolling, often taking adds water to reduce the concentration of emulsion, or even adds emulsifying agent and to reduce The granularity of oil, and reduce lubrication, when lubrication occurs owing in rolling, often take refuel to improve the concentration of emulsion, suppression more Or add chemical addition agent to weaken the emulsification function of emulsifying agent, but it is difficult to hold the degree of the precision of adjustment and adjustment；

3rd, the bad adaptability to rolling operating mode

Because cold rolling material is different, such as straight carbon steel, high-strength steel, silicon steel, rustless steel etc., the finished product also or during rolling phase same material Thickness is different, and the degree of processing hardening is not quite similar, and the requirement to lubrication also has very big difference, even same set of drawing sets Meter milling train out, also tends to because producing the handling process difference of kind or rolling later process, use condition is different, right The requirement of lubrication is also not quite similar；Once the component of ROLLING OIL is decided, it is difficult to fully meet the working condition requirement of complexity；

4th, aligned environment is had high demands

Greasy property due to emulsion is largely also affected by factors such as the ph of water, electrical conductivity, antibacterial and temperature, institute It is all generally the deionized water produced by ion exchange method (ro film) with the water used by preparation emulsion, during ph value is close Property, electrical conductivity is less than 5us/cm, and the water rate of deionized water 90% about, causes waste to water resource.In order to prevent growing Bacterial phagocytosis oils and fatss and reduce the lubricating ability of emulsion, the control temperature of emulsion must be maintained between 45-58 ° of c, because This, consume substantial amounts of energy.

Content of the invention

It is an object of the invention to provide a kind of evade the various defects being led to using emulsion, accurately provide lubrication simultaneously Refrigerating function perform to ultimate attainment it can be avoided that because crossing the rolling metal plate and tape lubrication technique lubricating and owing lubrication.

For achieving the above object, the technical solution used in the present invention is:

A kind of rolling metal plate and tape lubrication technique, is including more than single chassis or double-stand reversible mill or two frames In the metal plate and belt processing technique of rolling device that tandem mill is constituted,

By being arranged at the controlled nozzle of rolling direction entrance side metal plate and belt upper and lower flow that each constitutes frame, directly to The upper and lower surface spraying ROLLING OIL of described metal plate and belt；Simultaneously

The lubrication circumstances reacted according to rolling parameter, the quantity for spray of described nozzle adjust automatically ROLLING OIL is meeting and to maintain profit Sliding；Simultaneously

By the directly roll to milling train and the strip water spray of the outlet side in described frame rolling direction, it is used for carrying out technique cold But.

In a kind of above-mentioned rolling metal plate and tape lubrication technique,

The ROLLING OIL being sprayed is the pure oil of liquid and does not contain emulsifying agent；

The ROLLING OIL on described strip surface applies oil mass to be increased with the increase of the rolling advancing slip value of exit plate band, or reduces and subtract Little so that contact in rolling is in lubricating status；

By be arranged on rolling direction outlet side compressed-air atomizer to described metal plate and belt jet compression air, enter One step blows the cooling water in described strip off, in order to accurately spray ROLLING OIL again, enters next rolling work process.

A kind of rolling metal plate and tape lubrication technique provided by the present invention compared with prior art has advantages below；

First, lubrication and cooling are used separately, it is to avoid influence each other

There is provided lubrication with accurate spraying equipment in the entrance side of rolling direction directly to the upper and lower surface spraying ROLLING OIL of rolled piece, Outlet side in rolling direction is directly sprayed water simultaneously, to cool down and roll and rolled piece；Rolling entrance side only spray ROLLING OIL and not Water spray, thus avoiding water under high pressure to wash away the ROLLING OIL that part has been adsorbed on roll and metal plate and belt surface, not only guarantees The precision of the adsorbed ROLLING OIL of roll and metal plate and belt surface, and the function of lubricating and cool down independently is sent out Wave to the limit.

Second, precise control lubrication

The advancing slip value of rolled piece is one of important indicator of lubrication circumstances in reaction roll gap deformed area.With the carrying out of rolling, work as plate The advancing slip value of band is gradually increased, then react the lubrication in now roll gap and tend to die down, when advancing slip value persistently increases, then lubrication can be held Continue and decrease up to lack of lubrication, rolling cannot normally complete；Conversely, when the advancing slip value in operation of rolling tabularium tapers into, Then the lubrication in reaction deformed area is strengthened, and when advancing slip value is a lot of less than 0, arises that lubrication, roll in deformed area Arise that skidding with rolled piece, rolling also cannot be normally carried out；Rolling according to each frame (each passage of reversable mill) Feature is different, sets suitable advancing slip value span of control, when lack of lubrication in the operation of rolling by automatically controlled Automatic Program Painting oil mass in increasing strip, to improve lubrication, until advancing slip value returns to normal range, and maintains this lubricating status, otherwise As the same.

Second, the ROLLING OIL being used does not need containing emulsifying agent, and make ROLLING OIL composition simpler, ROLLING OIL Cost also therefore can reduce by 1/4 1/3, particularly ROLLING OIL can realize standardized production, and saves social capital； Realized to the lubrication excessively of board rolling and overcoming of deficient lubrication deficiencies by accurate adjustment distributive value, and greatly reduce rolling The consumption (10-20% can be reduced) of oil.

Third, lubrication oil supply amount is no longer the principal element of impact design milling train highest mill speed in theory.Essence simultaneously Really lubrication and strength cooling can reduce roll consumption and rolling power consumption.

Fourth, because profit is automatically separated, the process to waste liquid is more simple, and the requirement to temperature and water quality is relaxed, section Save the energy, and then be more beneficial for environmental protection.

Brief description

Fig. 1 is the principle schematic of prior art rolling metal plate and tape lubrication；

Fig. 2 is the schematic diagram of metal plate and belt single chassis reversable mill rolling lubrication cooling technique of the present invention；

The structural representation of the rolling metal plate and tape lubrication technique that Fig. 3 is constituted for four connecting rolling machine mechanism.

Specific embodiment

The rolling metal plate and tape lubrication the technique below in conjunction with the accompanying drawings present invention being provided is described in further details.

As shown in Fig. 2 the technique of the rolling metal plate and tape lubrication technique of the present invention being made up of single chassis reversable mill Schematic diagram；Constitute this device structure include by upper lower backing roll a+, a-, upper and lower intermediate calender rolls b+, b-, upper working rolls and lower working rolls c+, Frame and uncoiler k, coiling machine r, slewing rollers d+, d- and squeeze roll 121,122 that c- is constituted, the two of above-mentioned reversable mill The controlled electronics nozzle 131,132 of side, the ROLLING OIL quantity for spray of upper and lower setting of metal plate and belt 5 and flow, in above-mentioned unit Rolling mill both sides, the upper and lower of metal plate and belt is provided with emitted dose and the controlled upper backup roll of antithesis of flow, upper and lower intermediate calender rolls The nozzle 141,142 sprayed water with upper working rolls and lower working rolls, for cooling down to roll and metal plate and belt；In addition in milling train both sides, squeeze The outside of dry roller is provided with the compressed-air atomizer 111,112 of pressure controllable to strip jet compression air, further rolling The cooling water on metal plate and belt after system blows off, to start next rolling pass, can be accurate on strip surface again Spraying ROLLING OIL.

The technical process of above-mentioned single chassis reversable mill rolling metal plate and tape lubrication is, by motor pump group to entrance The metal plate and belt of side, the initial ROLLING OIL of setting one applies oil mass 150-400mg/m²(one side) (milling train exports coiling speed Applying oil mass when zero is 0), equably it is sprayed in the upper and lower surface of metal plate and belt by ROLLING OIL electronics nozzle 131, with rolling The carrying out in (along arrow f direction), the change of the advancing slip value of parameter metal plate and belt that fuel feeding model can lubricate according to milling train reaction, Closed loop control is carried out to the ROLLING OIL quantity for spray of rolling entrance side electronics nozzle 131, (ROLLING OIL spray painting control principle is with accompanying drawing 3 Stated, ROLLING OIL spray painting control process be described taking cold rolling four connecting rolling machine as a example) ROLLING OIL equably exists through electronics nozzle 131 The upper and lower surface spraying of strip；In rolling outlet side, low-temperature cooling water is injected in working roll, intermediate calender rolls and backing roll through nozzle 141 Cooled down Deng on roll and metal plate and belt.Before metal plate and belt batches, the water by 121 strip surfaces of squeeze roll is abundant After extracting, air nozzle 111 sprays compressed air and further the cooling water on metal plate and belt is blown off, then is batched；When entering Row next one passage, when rolling by arrow e direction, the coiling machine in Fig. 2 and the exchange function of uncoiler, electronics nozzle 132 is thrown Enter work, 131 closings；Cooling water nozzle 142 is devoted oneself to work, 141 closings；Squeeze roll 122 is devoted oneself to work, and 121 quit work； Compressed-air atomizer 112 is devoted oneself to work, and 111 closings quit work, and follow the conversion of rolling pass, and and so on circulation is until roll System terminates.

As shown in Fig. 3, it is the four connecting rolling machine mechanism and composition metal strip structure along f direction rolling lubrication cooling technique Schematic diagram；

The equipment of four frames is identical and is installed in series, and the electronic atomized nozzle of ROLLING OIL 11,21,31,41 is respectively placed in first, 2nd, the entrance side of the three, the 4th frames 1,2,3 and 4, the upper and lower of metal plate and belt 5, for metal plate and belt surface even application ROLLING OIL；Cooling water nozzle 12,22,32,42 is respectively placed in the outlet side of first, second, third, fourth frame, for cooling down Roll and metal plate and belt；It is cold that compressed-air atomizer 13,23,33,43 is respectively placed in first, second, third, fourth rack outlet side But the outside of (operating) water nozzle is clean for the cooling water on metal plate and belt surface is purged, so that accurate oiling or complete to batch.

Its ROLLING OIL spray painting control process is:

Because the rolling reduction of the first frame is generally all more than 30%, the working roll of the first frame and metal plate and belt raw material Surface roughness also generally all in more than 1um, the upper limit of the advancing slip value that strip is exported is set as that 5%, lower limit set is 1%, It is less than 150m/min(shear rate or creep speed in Mill Exit coiling speed) when, the first frame ROLLING OIL electronics nozzle 11 initial quantity for spray is set in 400mg/m²(one side) (when muzzle velocity is batched as 0, the quantity for spray of ROLLING OIL is 0), works as volume When taking speed to be more than 150m/min, apply oil mass and automatically controlled according to the change of advancing slip value；When advancing slip value is more than 5%, first Frame oil burner nozzle presses advancing slip value often increases by 0.1%, and quantity for spray is incremented by 10%, until advancing slip value returns to the intermediate value of 3%(1%+5%), And keep quantity for spray；When coiling speed is more than 150m/min, and advancing slip value reduces, adjustment process is contrary；Meanwhile, roll-force conduct Auxiliary monitoring alarm model, when actual roll-force exceeds computer setting +/- 30%, sends red alarm signal, to warn The lubrication of the contact in rolling of metal plate and belt was in lubrication or deficient lubricating status.

Set second and third frame advancing slip value be limited to 0-4% up and down, when milling train outlet coiling speed is less than 150m/min, Set the painting oil mass of ROLLING OIL electronics nozzle 21,31 as 300mg/m²(one side), when advancing slip value exceeds 4% or little in the operation of rolling When 0, the quantity for spray of electronics nozzle 21,31 is pressed the first frame identical regulative mode and is increased or reduce painting oil mass, until advancing slip When value returns to 2%, and maintain quantity for spray；Until the carrying out with rolling, advancing slip value goes beyond the scope, then adjusts painting oil mass and make Advancing slip value returns to normally, and maintains painting oil mass, and equally, roll-force is auxiliary monitoring alarm signal；

4th frame be final finished rolling machine frame, when this frame deflection be more than 20% when, arrange advancing slip value scope- 2%+2%, when coiling speed is when less than 150m/min, the quantity for spray of ROLLING OIL electronics nozzle 41 is 250mg/m²(one side), When advancing slip value changes and beyond set point when, by with first frame spraying fuel volume adjusting in the way of, electronics nozzle 41 increase or Reduce spraying oil mass, when the advancing slip value of metal plate and belt returns to 0%, electronics nozzle 41 maintains quantity for spray, until advancing slip value exceeds It is adjusted during set point again；If the deflection of this frame is less than 5%, rolls out whole function as hair and use, coiling speed is less than During 150m/min, initial ROLLING OIL electronics nozzle 41 quantity for spray that sets is in 150mg/m²(one side), sets advancing slip value scope 1%-- +3%；When coiling speed is more than 150m/min, and when advancing slip value exceeds 1-3%, electronics nozzle 41 is according to the first frame identical Regulative mode increases or reduces and applies oil mass, until the advancing slip value of metal plate and belt returns to 2%, and maintains quantity for spray；Four connecting rolling machine , to cool down based on metal plate and belt, the size of flow and temperature, by the warm requirement of volume for the water yield that nozzle 42 that (last frame) sprays water sprays It is adjusted.

The lubrication of contact in rolling is affected very by the roughness of surface of friction pair and the mechanical property of raw material and deflection Greatly, so, under different rolling machine frames (rolling pass of reversable mill) and mill speed, the size of advancing slip value is variant , can suitably adjust and arrange the span of control of advancing slip value according to actual situation, control theory identical.

In the outlet of rolling direction, in strip, the ROLLING OIL that cooled water washes out and cooling water flow back in collecting box on a small quantity, Because profit is insoluble, ROLLING OIL swims on liquid level, can be excluded by oil skimming machine, the iron powder producing because of deformation friction, and oil and iron powder Mixture still filtered by Magnetic filter separator.

In rolling metal plate and tape lubrication technique, according to the different machine of different strip materials, composition tandem mill The rolling reduction of frame, the roughness of roll and composition strip to control lubrication to arrange different advancing slip values, to overcome Lubrication and the appearance of deficient lubrication phenomenon.In the rolling metal plate and tape lubrication technique of patent of the present invention, only need to control strip table The distributive value of face ROLLING OIL was it is possible to overcome lubrication and the generation of deficient lubrication phenomenon.

The present invention use only advancing slip value and two rolling parameters of roll-force lubrication to contact in rolling as monitoring ginseng Number, to adjust the distributive value of electronics Jet control metal plate and belt, to be in lubricating status to realize the operation of rolling, it is to avoid owe lubrication and Cross the generation of lubrication phenomenon.Certainly, the size of the distributive value to metal plate and belt for the electronics nozzle can also be passed through, e.g., main frame electric current, The parameters such as main frame moment of torsion, to realize control, adjust electronics nozzle by the parameter value of the main frame electric current of setting, main frame moment of torsion Realize the control of the distributive value to metal plate and belt, equally can also realize the purpose of the present invention.

Claims

1. a kind of rolling metal plate and tape lubrication technique it is characterised in that: include single chassis or double-stand reversible mill or In the strip processing technique of rolling device that tandem mills more than two frames is constituted,

By being arranged at the controlled nozzle of rolling direction entrance side metal plate and belt upper and lower flow that each constitutes frame, directly to The upper and lower surface spraying ROLLING OIL of strip；Simultaneously

2. a kind of rolling metal plate and tape lubrication technique according to claim 1 it is characterised in that: the rolling being sprayed Oil is the pure oil of liquid and does not contain emulsifying agent.

3. a kind of rolling metal plate and tape lubrication technique according to claim 1 it is characterised in that: described strip surface Lubrication apply oil mass and increase with the rolling increase of the advancing slip value of exit plate band, or reduce and reduce and make contact in rolling be in profit Sliding state.

4. a kind of rolling metal plate and tape lubrication technique according to claim 1 it is characterised in that: rolled by being arranged on The compressed-air atomizer of the outlet side in direction processed to described metal plate and belt jet compression air, further cold in described strip But water blows off, in order to accurately spray ROLLING OIL again, enters next rolling work process.